There's currently a very brief explanation of choices at https://metacpan.org/pod/Tcl#Moving-Tcl/Tk-around-with-Tcl.pm. The second method (install Tcl/Tk to a known location, then tell Tcl.pm to use only that Tcl/Tk installation) or third method (static linking of Tcl.pm to Tcl/Tk, on-demand extracting of Tcl/Tk files) are what sound appropriate for this scenario.

In reply to Re^2: macOS tcl::pTk packing Tcl by chrstphrchvz
in thread macOS tcl::pTk packing Tcl by IB2017

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